STEPPING MOTOR CONTROL DEVICE, MOVEMENT, TIMEPIECE, AND STEPPING MOTOR CONTROL METHOD
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United States of America Patent
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Issued Date -
Sep 15, 2022
app pub date -
Mar 7, 2022
filing date -
Mar 12, 2021
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Abstract
A stepping motor control device configured to drive a stepping motor having a rotor and a coil includes: a train wheel including a load gear which has a load tooth whose rotation load is different from that of another tooth and in which the rotor has an odd number of rotation steps when the load gear rotates once, and transmitting a rotation force from the rotor to the hand; a voltage detection unit that detects an induced voltage generated at one end portion of a first end portion and a second end portion of the coil when the rotor vibrates; and a determination unit which, based on a result detected by the voltage detection unit, determines a mechanical load received by the rotor due to contact of the load tooth of the load gear with a tooth meshing with the load gear.
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